From: Linus Walleij <linus.walleij@linaro.org>
To: Dmitry Vyukov <dvyukov@google.com>,
Oleg Nesterov <oleg@redhat.com>,
Russell King <linux@armlinux.org.uk>,
Kees Cook <kees@kernel.org>,
Andy Lutomirski <luto@amacapital.net>,
Will Drewry <wad@chromium.org>,
Frederic Weisbecker <frederic@kernel.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
Jinjie Ruan <ruanjinjie@huawei.com>,
Arnd Bergmann <arnd@arndb.de>, Ard Biesheuvel <ardb@kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH RFC v3 25/30] ARM: entry: Create irqentry calls from kernel mode
Date: Tue, 07 Jan 2025 10:41:41 +0100 [thread overview]
Message-ID: <20250107-arm-generic-entry-v3-25-4e5f3c15db2d@linaro.org> (raw)
In-Reply-To: <20250107-arm-generic-entry-v3-0-4e5f3c15db2d@linaro.org>
This adds a few calls to C when exceptions enter/exit from
the kernel itself, so these can be used for generic entry.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
arch/arm/include/asm/entry.h | 2 ++
arch/arm/kernel/entry-armv.S | 3 +++
| 5 +++++
arch/arm/kernel/entry.c | 8 ++++++++
4 files changed, 18 insertions(+)
diff --git a/arch/arm/include/asm/entry.h b/arch/arm/include/asm/entry.h
index 8b8cc9a1eefbd00dd75d4e344576fc184a413768..a78bc5054b093120e903f08369fb8b1a9feb7f81 100644
--- a/arch/arm/include/asm/entry.h
+++ b/arch/arm/include/asm/entry.h
@@ -12,5 +12,7 @@ long syscall_enter_from_user_mode(struct pt_regs *regs, long);
void syscall_exit_to_user_mode(struct pt_regs *regs);
void irqentry_enter_from_user_mode(struct pt_regs *regs);
void irqentry_exit_to_user_mode(struct pt_regs *regs);
+void irqentry_enter_from_kernel_mode(struct pt_regs *regs);
+void irqentry_exit_to_kernel_mode(struct pt_regs *regs);
#endif /* __ASM_ENTRY_H__ */
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 3cd5a80b47758867d1db6c3971030370bca1551a..f64c4cc8beda6bcd469e6ff1a1f337d52dbbaf9c 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -205,6 +205,9 @@ ENDPROC(__und_invalid)
get_thread_info tsk
uaccess_entry tsk, r0, r1, r2, \uaccess
+ mov r0, sp @ 'regs'
+ bl irqentry_enter_from_kernel_mode
+
.if \trace
#ifdef CONFIG_TRACE_IRQFLAGS
bl trace_hardirqs_off
--git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S
index 51c7f93c1ded1db56f173c7aaed8094ef011ff5a..49a9c5cf6fd5fbb917f2ada6c0d6cc400b7d3fb3 100644
--- a/arch/arm/kernel/entry-header.S
+++ b/arch/arm/kernel/entry-header.S
@@ -210,6 +210,7 @@
.else
@ IRQs off again before pulling preserved data off the stack
disable_irq_notrace
+
#ifdef CONFIG_TRACE_IRQFLAGS
tst \rpsr, #PSR_I_BIT
bleq trace_hardirqs_on
@@ -217,6 +218,10 @@
blne trace_hardirqs_off
#endif
.endif
+
+ mov r0, sp @ 'regs'
+ bl irqentry_exit_to_kernel_mode
+
uaccess_exit tsk, r0, r1
#ifndef CONFIG_THUMB2_KERNEL
diff --git a/arch/arm/kernel/entry.c b/arch/arm/kernel/entry.c
index d7fdb9df33312dd2a914b59512b701748f33b597..674b5adcec0001b7d075d6936bfb4e318cb7ce74 100644
--- a/arch/arm/kernel/entry.c
+++ b/arch/arm/kernel/entry.c
@@ -56,3 +56,11 @@ noinstr void irqentry_exit_to_user_mode(struct pt_regs *regs)
/* This context tracking call has inverse naming */
user_enter_callable();
}
+
+noinstr void irqentry_enter_from_kernel_mode(struct pt_regs *regs)
+{
+}
+
+noinstr void irqentry_exit_to_kernel_mode(struct pt_regs *regs)
+{
+}
--
2.47.1
next prev parent reply other threads:[~2025-01-07 9:42 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-07 9:41 [PATCH RFC v3 00/30] ARM: Switch to generic entry Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 01/30] ARM: Prepare includes for " Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 02/30] ARM: ptrace: Split report_syscall() Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 03/30] ARM: entry: Skip ret_slow_syscall label Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 04/30] ARM: process: Rewrite ret_from_fork i C Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 05/30] ARM: process: Remove local restart Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 06/30] ARM: entry: Invoke syscalls using C Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 07/30] ARM: entry: Rewrite two asm calls in C Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 08/30] ARM: entry: Move trace entry to C function Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 09/30] ARM: entry: save the syscall sp in thread_info Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 10/30] ARM: entry: move all tracing invocation to C Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 11/30] ARM: entry: Merge the common and trace entry code Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 12/30] ARM: entry: Rename syscall invocation Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 13/30] ARM: entry: Create user_mode_enter/exit Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 14/30] ARM: entry: Drop trace argument from usr_entry macro Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 15/30] ARM: entry: Separate call path for syscall SWI entry Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 16/30] ARM: entry: Drop argument to asm_irqentry macros Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 17/30] ARM: entry: Implement syscall_exit_to_user_mode() Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 18/30] ARM: entry: Drop the superfast ret_fast_syscall Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 19/30] ARM: entry: Remove fast and offset register restore Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 20/30] ARM: entry: Untangle ret_fast_syscall/to_user Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 21/30] ARM: entry: Do not double-call exit functions Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 22/30] ARM: entry: Move work processing to C Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 23/30] ARM: entry: Stop exiting syscalls like IRQs Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 24/30] ARM: entry: Complete syscall and IRQ transition to C Linus Walleij
2025-01-07 9:41 ` Linus Walleij [this message]
2025-01-07 9:41 ` [PATCH RFC v3 26/30] ARM: entry: Move in-kernel hardirq tracing " Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 27/30] ARM: irq: Add irqstack helpers Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 28/30] ARM: entry: Convert to generic entry Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 29/30] ARM: entry: Handle prefetch and data aborts as interrupts Linus Walleij
2025-01-07 9:41 ` [PATCH RFC v3 30/30] RFC: ARM: entry: Block IRQs in early IRQ context Linus Walleij
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250107-arm-generic-entry-v3-25-4e5f3c15db2d@linaro.org \
--to=linus.walleij@linaro.org \
--cc=ardb@kernel.org \
--cc=arnd@arndb.de \
--cc=dvyukov@google.com \
--cc=frederic@kernel.org \
--cc=kees@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=luto@amacapital.net \
--cc=oleg@redhat.com \
--cc=paulmck@kernel.org \
--cc=ruanjinjie@huawei.com \
--cc=viro@zeniv.linux.org.uk \
--cc=wad@chromium.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®